Indonesia issued a tsunami warning for West Sumatra, North Sumatra and Aceh after a powerful and shallow earthquake of magnitude 7.9 struck off the west coast of the Indonesian island of Sumatra on Wednesday, the National Meteorolgical Agency said.
A powerful and shallow earthquake of magnitude 7.9 struck off the west coast of the Indonesian island of Sumatra on Wednesday, the U.S. Geological Survey said.
The epicenter was 808 km (502 miles) southwest of Padang, USGS said. It was 10 km (six miles) deep.
The earthquake on Wednesday killed some people, but it was not yet clear how many, an official of the country's search and rescue agency told Reuters.
"There are some who have died," said Heronimus Guru, the agency's deputy head of operations, without giving details.
USGS originally put the magnitude at 8.2, and then 8.1, before lowering it to 7.9.
Indonesia, badly hit by the Indian Ocean tsunami in 2004, straddles the so-called "Pacific Ring of Fire", a highly seismically active zone where different plates on the earth's crust meet and create a large number of earthquakes and volcanoes.